Dichloroacetamides, herbicides containing acetanilides as herbicidal active ingredients and the dichloroacetamides as antagonists, and the use of these herbicides in controlling undesired plant growth

Abstract

Novel dichloroacetamides of the formula (I) ##STR1## where R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , m, n, p and q have the meanings given in the description. The compounds are antagonists which increase the toleration, by crops, of herbicidal acetanilides. Herbicides containing the dichloroacetamides of the formula I in combination with acetanilides may be used for controlling undesired plant growth in Indian corn and cereals.

We claim: 
     
       1. A dichloroacetamide of the formula ##STR43## where R 1  is hydrogen, methyl or ethyl, R 2  and R 3  are identical or different and are hydrogen, methyl or methoxy,   R 4  is hydrogen or methyl and   R 5  and R 6  are identical or different and are hydrogen or methyl, and   m is 0 or 1, n is 1 or 2, p is 0, 1 or 2 and q is 0, 1 or 2, the sum of p+q being 1 or 2.   
     
     
       2. 5-Dichloroacetyl-6-methyl-9-oxo-1,5-diazabicyclo[4.3.0]nonane. 
     
     
       3. 5-Dichloroacetyl-3,3,6-trimethyl-9-oxo-1,5-diazabicyclo[4.3.0]nonane. 
     
     
       4. 4-Dichloroacetyl-5-methyl-8-oxo-1,4-diazabicyclo[3.3.0]octane.